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From: Steinar Bang <sb@metis.no>
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Subject: overriding the sender header
Date: 29 Jan 2000 13:59:28 +0100
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Platform: Dell Inspiron 3500 laptop, SuSE linux 6.3, Xemacs 20.4, Gnus 5.8.3

Is the envelope header set from the sender: field?  Or is it set by
sendmail? 

I've been grepping through the emacs lisp code.

It looks like I have to defadvice message-make-sender or something, to 
be able to lose the Sender: header (which I do think is a good idea
anyways, no matter what FAQ Q2.15 says).

Is this a correct assumption or is there a smarter way?  A variable to 
set?

The reason I would like to change the envelope header, is that my
laptop has a different network address depending on which network it
is connected to, or if it's connected through a dial up, and the
address it has at the time of a bounce may be a different one that it
had when the message was sent, or it may not be connected at all.

Besides there is the annoyance with listserv.  I would prefer listserv 
to subscribe the address in the From: field as set by
gnus-posting-styles.